K2 Skate Women's VO2 Max 90 Boa Inline Skates Original K2 Softboot This maneuverable frame that has enough length and stiffness to provide stability at the highest of speeds The Vortech cuff adds a stiffening shim to our proven Stability Plus design, the best of both worlds: maximum support and lightweight design Wheels/Bearings: 90mm, 80a/ILQ-9 Classic Plus Lacing System: Boa Closure System